ok, i've got a question. let's say, i want to transform myself - or a willing target (just don't tell the council). (or let's say i want to give an ally the ability to breath water... )

what must I take into account? i presume the spell targets his or her endurance as a maneuver to stick the WATERBREATHING aspect on him or her.

must the spell just overcome the endurance rank or must i prepare the spell for endurance+fudge dice (which could make if quite difficult, when all are +)?

example: tha target has endurance 3 - should the spell then have a complexity of 3 (which would also mean that a practicioner with lore of 4 must take no additional preparations) or is the spell against and endurance roll? (which could have a maximum of 7, for which the spellcaster needs to channel more juice into the spell and needs additional preparations and/or foci or invoking of aspects).

Couldn't you do the same thing with a thamaturgic transformation of the element of water to the element of air for the person as a maneuver (Water turns to air when I breathe it!), for a duration of time dependent on the shifts you spent?  Since you're doing it as a maneuver, you may need the 3 shifts, but you're not being a Lawbreaker, and he probably doesn't need to roll any defense dice.